Question 878950
P(face card|queen) means "the probability that you draw a face card given you have drawn a queen"


That part "given you have drawn a queen" means it is 100% known that you pulled out a queen. This is "given" to you. It's assumed to be true.


Since all queens are face cards, this means drawing a queen tells us we also drew a face card.


So if we're guaranteed a queen, then we are guaranteed a face card.


Making P(face card|queen) = <font color="red">1</font>


A probability of 1 represents 100% which is absolution certainty.